Yamaha 4 HP Tiller Outboard Motor - F4 - 2025

Yamaha's 139 cc 4 HP portable outboard mirrors the OHV F6, with a couple less horses. It features the same ergonomic, easy-grip starter handle with a built-in decompression device for effortless starts. The F4 also features a built-in fuel tank with the option of switchable access to an additional external tank for amazing extended range. There's no stopping this little brute.

Features:

• Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle
• Only 59 lbs (15" shaft model, dry weight)
• Solid 6A alternator

Specifications:

• Engine type: 1 cylinder
• Displacement: 139 cc
• Bore x stroke: 62 x 46 mm (2.44 x 1.81")
• Prop shaft horsepower: 4 HP at 4500 rpm
• Full throttle RPM range: 4000 ~ 5000
• Alternator output at wide open throttle: 6A
• Compression ratio: 8.9:1
• Fuel Induction system: carburetor
• Weight: 27 kg (59 lbs)
• Recommended fuel: octane 87
• C.A.R.B. rating: 3-Star
• Exhaust: above propeller
• Intake: 2
• Ignition: CDI
• Spark plug: CR6HSB
• Alternator output: 6A (charging kit required, sold seperately)
• Starting system: manual
• Lubrication: wet sump
• Engine oil capacity: 0.6 L
• Recommended cooling: thermostatic control
• Ethanol blend limit: 10% maximum
• Gear ratio: 2.08:1
• Gear shift: forward, neutral, reverse
• Degree of tilt: 69 deg.
• Degree of trim: -4 deg. through +16 deg.
• Dry weight: 27 kg (59 lbs)
• Steering angle (maximum): 90 deg. from center, either direction
• Integral fuel tank: 0.29 gal (1.1 L)
• Fuel line included
• Standard 3-blade aluminum propeller: 7 1/2" x 7"
• External fuel tank capable (not included)
• Factory Warranty: 3 years. Warranty begins on date of purchase.

Owner's Manual (4.18 MB)